/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.jstorm.elasticsearch.common;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class EsOutputDeclarer implements Serializable {

  private static final long serialVersionUID = 8273553454942900376L;
  
  private List<String> fields = new ArrayList<String>();

  public EsOutputDeclarer addField(String... names) {
    for (String name : names) {
      fields.add(name);
    }
    return this;
  }

  public String[] getFields() {
    return fields.toArray(new String[0]);
  }

  public List<Object> getValues(Map<String, Object> source) {
    List<Object> values = new ArrayList<Object>();
    for (String field : fields) {
      values.add(source.get(field));
    }
    return values;
  }
  
}
